Okay! I'll give it another try. It may just be the photos or angle of the shot but pullet 2 looks to have more narrow feathers in her tail. It also looks like she does not have as broad a tail spread as the other two but again that may be the angle of the shot. Also, could they use a little more depth in their chest in order to have that upside down bowler hat profile? Will they have a chance of developing this as they mature? I can't really tell how wide bodies are on the first 2 but the 3rd one looks like she has a wide body based on she is standing. I may be way off on these observations but I want to learn and that means daring to be wrong!
Think you might be right about the slightly narrower tail feathers. They're relatively young so we might get some more depth. There's one thing that about #1 and one thing about #2 I'm not terribly wild about. See if you can spot them.